I wonder if anyone has made a wheel (like a pregnancy wheel) for bee breeding?

The "pregnancy wheel" in medicine has two concentric circles that pivot at the center. The outer circle is calendar dates. The inner circle is marked with pregnancy events. For example one turns the wheel to set "conception" at a certain date and the wheel calculates the estimated baby due date.

The "bee wheel" would have the inner wheel marked with bee milestones. Example "egg laid" on day 0, graft on day 4, capped cells, emerged cells, etc. One could set the wheel at any of these milestones and see the approximate dates of other events. For example, if I find capped cells on a certain date, I would have a quick way to see a date rage when I might see evidence of laying queen. (Without doing the calendar math in my head.)

I made a very crude one using paper and an old CD. It does work, but would be nice if anyone has come up with a nice one printed on plastic?

"Tell me and I'll forget,show me and I may remember,involve me and I'll understand" Chinese Proverb

"The farmer is the only man in our economy who buys everything at retail, sells everything at wholesale, and pays the freight both ways." John F. KennedyFranklin County Beekeepers Association MA. http://www.franklinmabeekeepers.org/

I just use a simply page as outlined below. This allows me to add a page to a notebook for each graft, then keep notes along the way, keep it on file, refer back to it if problems come up later, etc. Once you plug the first date in, you just count off the days and plug in the dates. I keep the log book in the truck and have found out that waiting till the end of the day and then logging everything back in a computer, just wastes more time and things are easily forgotten 8 hours later at home at the end of a long day.